512Superstructure Concrete

512.1 Description

This Work consists of construc ting concrete Bridge decks, reinf orced-concrete box-girder Bridges; slab Bridges, slant-leg Bridges, truss Bridges, and ot her structural configurations requiring the use of Superstructure concrete, also referred to as Class AA or Class HPD (High Performance Deck) concrete. Cast-in-place concrete placed in Bridges above the bearings wil l be Class HPD unless otherwise shown in the Contract. Bridges with integral abutments shall have wingwalls, end diaph ragms, and concrete above the bearings construct ed of Class HPD concrete. Approach slabs, transition slabs , integral pier and abutment ca ps, and Superstructure appurtenances shall be constructed with Class HPD concrete, unl ess otherwise shown in the Contract.

512.2 Materials

The Contractor shall provide Cla ss HPD concrete in accordance w ith Sections 509, “Portland Cement Concrete Mix D esigns” and 510, “Portland Cemen t Concrete.” The Contractor shall provide steel reinforcing bars and epoxy-c oated steel reinforcing bars in accordance with Section 540, “Steel Reinforcement.”

512.3 Construction Requirements

Requirements contained in Section 511, “Concrete Structures,” w ill apply unless expressly modified in this Section.

512.3.1 Deck Placement Conference

The Project Manager will hold a Deck Placement Conference three (3) to seven (7) Days before the anticipated deck placem ent to review the specificati on requirements and discuss the Contractor’s preparations. The recommended agenda checklist is available from the Bridge B ureau.

512.3.2 Profile Survey of Girders

After placing girders and before setting screeds, the Contracto r shall take a profile along each line of girders. If actual top of girder elevations diffe r significantly (more than a nominal haunch dimension) from those shown on the Plans such that exces sive haunches or deficient slab thickness would result, the Contractor shall make appropri ate adjustments as directed by the State Bridge Engineer.

512.3.3 Falsework

The Contractor shall design a lateral bracing system to support the deck overhang and to resist the entire torsional load from the deck overhang during construction. Design of lateral bracing system shall be in accordance with the AASHTO Guide Design Specifications for Bridge Temporary Works . In the event of a conflict between the referenced Guide and this specification, this specific ation will take precedence. The screed rails supporting the concrete deck finishing machine shall be supported directly on the center of the bridge girders. The concrete dec k overhangs shall be screeded and finished by hand. The Contractor shall submit the Working Drawings for the latera l bracing system and the design calculations stamped by a NM licensed Professional Engin eer with a minimum of five

512.3.4 Forms

The Contractor shall use deck forms in accordance with Section 511.3.3, “Form Construction.”

512.3.4 1 Permanent Steel Deck Forms

The Contractor shall provide Material and elements for the perm anent steel deck form units that are fabricated from steel in accordance with ASTM A 653M (A653) Grade A-3. The Contractor shall provide a Class G 165 coating. The Contractor shall provide form sheets and form supports in accordance with the shop drawings; that are at least 22 gauge and 16 gauge thick, respectively. The Contractor shall not use permanent steel forms in panels wh ere longitudinal slab construction joints are located between stringers. The Contrac tor shall provide proper vibration of the concrete to ensure adequate consolidation of c oncrete.

512.3.4 1.1 Permanent Ventilated Steel Deck Form Design

The Contractor shall design permanent steel forms to support su perimposed dead loads of the form, reinforcement, and pl astic concrete, plus a live l oad of 50 pounds per square foot. The Contractor shall use steel ventilated at a minimum rate of 1/2 inch 2 per square foot. The Department will not allow the following: 1. Unit working stresses to exceed the lesser of the following: 1.1. 72.5% of the specified minimum yield strength of the Mater ial, or 1.2. 36,000 psi. 2. Maximum deflections under the weight of the plastic concrete , reinforcement, and form, to exceed the lesser of the following: 2.1. 1/240 of the form span, or 3. A load used to compute the deflection that is less than 120 lb per square foot. The form span for design and defle ction is the clear distance b etween the flanges of the supporting girders less two (2) inches, measured parallel to th e form flutes. The Contractor shall limit the increase in dead load due to the use of permanent steel deck forms to 15 lb per square f oot. If the increase exceeds t his limit, show that the additional load will not be detrimental; or strengthen the Structure to ac commodate the extra load, at no additional cost to the Department. The Contractor shall calculate ph ysical design properties in ac cordance with the current American Iron and Steel Institute Specification for Design of Cold-Formed Steel Structural Members . The Contractor shall design the permanent steel deck forms so t hat the deck slab laterally supports the steel girder or girder top flanges in co mpression, except where providing shear connectors. The Contractor shall provide desi gn calculations to the Project Manager for approval by the State Bridge Engineer 14 Days prior to ordering.

512.3.4 1.2 Permanent Steel Deck Form Installation

The Contractor shall not rest form sheets directly on the top o f the stringer or floor beam flanges. The Contractor shall securely fasten sheets to form s upports. The Contractor shall use sheets with a minimum bearing length of one (1) inch at eac h end. The Contractor shall place form supports in direct contact with the flange of string ers or support beams. The Contractor shall make attachments with welds, bolts, clips, or other approved means; the Contractor not weld to girder or beam flanges. All welding mus t be performed by a certified welder in accordance with the applicable documents and welder q ualifications listed in Section 541.3, “Steel Structures; Construction Requirements.” The Contractor shall place bottom reinforcing bars with a minim um cover of one (1) inch. Except in cases where reinforcing bars are not parallel to form corrugations, the Contractor shall center the bars (approximately) in the bottom layer of th e main reinforcement over the valleys of the forms when necessary to achieve the minimum conc rete cover. The Contractor shall not allow the distance from the top of the slab to the bo ttom layer of main slab reinforcement to be less than the dimension shown in the Contra ct.

512.3.5 Placing of Reinforcing Bars

The Contractor shall firmly support reinforcing bars in deck sl abs with approved devices spaced at intervals not exceeding 3.3 ft. The Contractor shall securely tie down reinforcing bar mats in Bridge decks to girders and forms to prevent upward movement during concrete placement. The Contractor shall not allow the spacing between adjacent rei nforcement bars to vary more than 1/2 inch from the dimensions shown in the Contract. The Contractor shall place and maintain reinforcement bars within 1/4 inch of the vertical dimensions shown in the Contract. The Contractor shall not allow the concrete cover ov e r t h e t o p l a y e r s o f reinforcement to be less than two (2) inches. For continuous steel Bridges, the Contractor shall complete the forming and placing of Section 512: Superstructu re Concrete Page 375 reinforcing steel and screed rail settings for the entire lengt h of the Bridge before proceeding with any portion of the deck placement, unless otherwise author ized by the State Bridge Engineer.

512.3.6 Preparation for Placing Concrete

512.3.6 1 Support of Finishing Machines

The Contractor shall ensure finishing machines travel on steel rails. The Contractor shall provide pipe for rails with 2 3/8 inch outside diameter and 1 1 5/16 inch inside or heavier. The Contractor shall firmly support rails on adjustable steel suppo rts. The Contractor shall securely fasten supports in place and do not space them more th an 30 inches apart. The Department will not allow the Contractor to weld the supports t o top flanges of steel girders or girders, or to the stirrups of concrete girders.

512.3.6 2 Setting of Screed Rails

The Contractor shall set the steel rails for placing and finish ing Equipment to finish the deck in accordance with the Contract or as directed by the Proj ect Manager. The Contractor shall make the accuracy of setting the rails consistent with th e required tolerances for smoothness. The Contractor shall check elevations and straight ness of the rails by survey, straight edging or string lining, and sight by eye. If supporting the finishing machi ne over an outside girder, the Contractor shall check edge forms for the deck for vertical alignment and install in a ccordance with the Contract tolerances for smoothness. The Contractor shall provide rails that extend a sufficient distance beyond both ends of the scheduled length of placement to permit the finishing machine to reach all areas of the concrete placed and to permit off-deck p arking of the machine out of the way of the hand finishers. The Contractor shall check the fini shing machine setup for correct deck cross sections. The Contra ctor shall check blockouts for expansion joints for proper depths and widths of openings.

512.3.6 3 Finish Machine Trial Run

At least 24 h before placing concrete, the Contractor shall tra verse the finish machine the length of the proposed placement or, if a continuous steel Brid ge, for the full length of the Bridge. The Contractor shall demonstrate that the following performance criteria are met during the trial run: 1. Use of required deck slab thickness, top of deck elevations, and the specified reinforcing bar cover; unless otherwise noted on the Plans, pro vide cover to the top of the top reinforcing bars of from 2 (two) inches to 2 7/16 in ches. When checking the deck slab thickness, top of deck elevations, and cover, all ow for deflections of supports resulting from the weight of the concrete; 2. Do not allow screed rails to deflect excessively; 3. The finishing machine is pr operly adjusted and in good worki ng order; and 4. The finishing machine will properly track over the entire le ngth of the proposed placement, particularly for decks that are curved, super-elevat ed, or that have a high skew.

512.3.6 4 Work Bridges

Section 512: Superstructu re Concrete Page 376 The Contractor shall provide one (1) or two (2) transverse Work Bridges for floating, straight edging, and curing operations. The Contractor shall p rovide Work Bridges that are structurally sound and do not deflect excessively. The Contrac tor shall test the Work Bridges in place before the deck placement to ensure proper adjustments of wheels, adequate clearances to safety railings, and compliance with other requir ements.

512.3.7 Placing of Concrete

The Contractor shall place concrete by pumping or other approve d means. The Contractor shall place concrete close to the final position and to the full thickness of the slab. The Contractor shall place concrete far enough in fr ont of the finishing machine to ensure proper striking off and fi nishing, generally a distance not greater than 12 ft. Unless otherwise directed by the Project Manager, the Contracto r shall consolidate concrete with suitable mechanical vibrators operating within th e concrete. During concrete placement, the Contractor shall keep enough personnel, vibrator s, and other tools available to assure adequate consolidation. If necessary, the Contractor sh all supplement vibrating with hand spading with suitable tools to assure proper consolidation . If using vibrators, the Contractor shall use procedures in accordance with ACI 309. The Contractor shall not use a “jitterbug” or any other flat to ol that could cause concrete segregation. The Contractor shall use approved vibrators that can transmit v ibration at frequencies up to 10,000 Vpm. The Contractor shall provide vibrators that hav e each been certified within the last 90 Days to provide 8,000 to 10,000 Vpm. The Contractor shall operate vibrators to consolidate the concr ete thoroughly around the reinforcement and embedded fixtures and into corners and angles of the forms. The Contractor shall not use vibrators to make concrete flow or run . The Contractor shall vibrate long enough to accomplish consolidation, but do not vibrate so long to cause segregation or air bubbles. The Contractor shall insert the vibrators vertica lly into the concrete, and immediately withdraw upward along the same line with the opposi te motion. The Contractor shall not drag the vibrator horiz ontally across the placing are a. When operating vibrators, the Contractor shall avoid contact wi th reinforcing bars, particularly epoxy coated reinforcing bars or bars that extend into concrete that has taken an initial set. If vibrating concrete in areas reinforced with ep oxy-coated bars, the Contractor shall cover the vibrators with nonmetallic sleeves to prevent damage to the epoxy coating. If hydraulic fluid, motor oil, dirt, or other Deleterious Mater ial leaks or falls onto the deck, the Contractor shall remove contaminated concrete from the deck before proceeding. The Contractor shall place concrete for abutment and/or pier di aphragms monolithically with Bridge deck, unless otherwise shown in the Plans.

512.3.7 1 Pumping of Concrete

Before placing concrete, the Contractor shall thoroughly clean the Equipment. The Contractor shall operate the pump to produce a continuous strea m of concrete without air pockets and no appreciable loss of slump. If placing concrete by pumping, the Contractor shall not add wa ter at the concrete entrance hopper. If adding water at the pump hopper to clear a clogged pump, the Contractor Section 512: Superstructu re Concrete Page 377 shall remove and dispose of concrete in the hopper and the line . The Contractor shall obtain the Project Manager’s approval of c oncrete pumping Equipment before use. The Contractor shall provide a backup pl acement system capable of completing concrete placement to a bulkhead in case of a pump f ailure. The Contractor shall provide bulkheads that are pre-c ut and ready for installation. The Contractor shall not use aluminum pipe as a conduit for con crete placement. The Department will test concrete for Acceptance at the dischar ge end of the pump, and collect samples from concrete placed on the deck.

512.3.7 2 Delays in Deck Placement

The Contractor shall stop placement operations and correct, if one (1) of the following problems occur: 1. A deck-finishing machine fails; 2. Placement operations are not within the specification requir ements; or 3. Placement operations are not a chieving satisfactory results. If the concrete placement is Delayed, the Contractor shall stop all other placement operations until the cause of the Delay is corrected. If the Contractor fails to correct the problem within 45 min (o r within 60 min if using a set retardant), the Contractor shall erect a bulkhead parallel to t he finishing operations and as close as practical to the location that placement originally st opped. The Contractor shall finish concrete to the bulkhead and disc ontinue placement operations f or the Day. Before deck placement, the Contractor shall cut the bulkhead to length and slot it for reinforcing bars. For slab Bridges, the Contractor shall install the bulkhead as close to one (1) of a span’s quarter points as possible. If deck placement operations have been suspended and bulkheads installed, the Contractor shall not resume deck construction until after 12 h and after taking adequate corrective measures to ensure conc rete mixing, placement, finis hing, and curing are performed in accordance with the Contract, as approved by the A ssistant District Engineer for Construction in consultation wi th the State Bridge Engineer.

512.3.7 3 Rate of Evaporation Limitations

The Contractor shall comply with Section 511.3.4.5, “Rate of Ev aporation Limitations.”

512.3.7 4 Rate of Progress

The Contractor shall provide a rate of progress of Bridge deck placement in accordance with the Contract. If the Contract does not define a rate, the rate of progress will be at least 30 ft per hour over the entire width of the deck, except for sl ab Bridges, for which the rate will be at least 20 ft per hour. If the placement includes integr al pier or abutment diaphragms, the Contractor shall not include the time required to place the diaphragms in the rate o f placement calculations. The Contractor shall include Delays in the placement due to other c auses in the calculation of the overall rate of pour. Section 512: Superstructu re Concrete Page 378 The Department may reject decks placed at rates slower than spe cified. The Project Manager may decrease the rate of placement by 25%, if the following conditions exist: 1. The rate of evaporation is less than 0.08 lb per square foot per hour; 2. The wind velocity on the deck is less than ten (10) mph; and 3. The Contractor is producing an Acceptable finish.

512.3.7 5 Concrete Placement in Girders

Unless otherwise approved by the Assistant District Engineer – Construction, the Contractor shall uniformly deposit concrete in girders the full length of the girder and bring up evenly in horizontal layers not exceeding two (2) ft in depth.

512.3.8 Temperature and Weather Limitations

512.3.8 1 Temperature Requirements

The Contractor shall comply with Section 511.3.4, “Temperature and Weather Limitations.”

512.3.8 2 Change in Weather Conditions

The Contractor shall assume the risk of proceeding with deck pl acement during marginal weather. The Contractor shall repair or remove and replace con crete damaged due to changing weather conditions. After placement operations have started, if weather conditions change causing evaporation rates to exceed those previously specified or if ot her adverse weather conditions arise, the Contractor shall immediately place an emergency bulk head, finish concrete to the bulkhead, and discontinue placem ent operations for the Day. The Contractor shall keep Materials available to cover and prot ect unfinished deck areas and completed deck areas ahead of and behind the finishing mach ine as the machine moves forward to the bulkhead.

512.3.9 Finishing

The Contractor shall ensure that the rideability, drainage, and s u r f a c e t e x t u r e characteristics of finished Br idge deck slabs meet the requirem ents specified. The Contractor shall provide deck with smooth transitions at en ds of Bridges and across expansion and construction joints . The Contractor shall provid e deck that is free draining, with no depressions. Unless otherwise specified in the Contract or approved in writi ng by the Assistant District Engineer for Construction, the Contractor shall operate finishi ng machines with the skew of the Structure. The Contractor shall float and broom the plastic co ncrete parallel to the finishing operation. The Contractor shall provide a ten (10) foot long, lightweight, round-bottom, straightedge equipped with a long handle, as approved by the Project Manager . The Contractor shall not add water to the surface of the concre te to assist finishing.

512.3.9 1 Finishing Machine

The Contractor shall finish Bridge deck slabs and approach slab s with approved power driven finishing machines, unless the use of such machines is i mpractical and the Assistant District Engineer – Construction provides a written waiver. The Contractor shall use finishing machines with one (1) or mor e rotating rollers, augers, and vibratory pans providing from 2,500 Vpm to 4,000 Vpm.

512.3.9 2 Finishing of Slab Edges

If an exterior beam or girder supports a finishing machine, the Contractor may hand finish the deck slab between the exterior beam or girder and the edge of the deck slab.

512.3.9 3 Hand Finishing Plan Submittal

The Contractor may finish the concrete deck slabs by hand if th e use of a finishing machine is not possible. The Contractor shall submit a hand-fi nishing plan to the Project Manager for approval before initiating placement operations. T he plan will describe the screed arrangement and proposed methods of finishing.

512.3.9 4 Final Finishing Operations

Immediately following the initial finishing operations and whil e the concrete is still plastic, the Contractor shall test the slab surface for trueness in acco rdance with Section 512.3.10.2, “Acceptance Criteria,” by using the straightedge as a float. T he Contractor shall advance the straightedge longitudinally along the slab in successive stages not more than 1/2 the length of the straightedge. The Contractor shall correct variations in the surface of the s lab by striking off projections and filling depressions with freshly mixed concrete. The Contr actor shall consolidate and refinish the corrected areas w ith a long handled float at least three (3) ft in width. The Contractor may use small hand floats if approved by the Pro ject Manager. The Contractor shall recheck the surface with a straightedge. During the floating and straight-edging process, the Contractor shall check and ensure that the deck has the proper crown, slope, and grade. The Cont ractor shall construct deck surfaces in the vicinity of de ck drains to slope gently toward the drains. The Contractor may use a float three (3) ft or greater in width to seal the surface behind the finishing machine. Final finishing operations will follow the trailing edge of the finishing machine closely, generally, at a distance of 13 ft or less. The Contractor shal l not allow more than one (1) h to elapse between the time of placement of concrete on the deck an d the completion of final finishing operations. Unless otherwise specified in the Contract, the Contractor shal l apply a broomed finish to the plastic concrete paralle l to the finishing operation.

512.3.10 Final Operations

512.3.10 1 Curing

Unless otherwise specified in the Contract, the Contractor shal l cure Bridge decks and approach slabs in accordance with Section 511.3.10, “Curing.” The Contractor shall ensure forms supporting Bridge decks rema in in place for at least seve n (7) Days.

512.3.10 2 Acceptance Criteria

The Contractor shall test the smoothness of the completed Roadw ay surfaces of Bridge decks, approach slabs, and the adj oining 50 ft of approach pave ment. After the concrete of Bridge decks, approach slabs, and pavement hardens, the Contrac tor shall check the entire surface areas with a ten (10) foot straightedge. The Contracto r shall hold the straightedge in successive positions parallel to the centerline of the Roadway and in contact with the slab. The Contractor shall advance the straightedge longitudinally al ong the slab in successive stages no greater than half the length of the straightedge. The Contractor shall provide a finished surface plane of Bridge decks and approach slabs that do not vary more than 3/16 inch, measured from the bottom of the straightedge. The Contractor shall provide a finished surface of concrete or asph alt approaches that does not vary more than 1/4 inch, measured from the bottom of the straig htedge. The Contractor shall plainly mark variations that e xceed the allowable values. The Contractor shall ensure that vertical steps or discontinuit ies at the ends of Bridges and approach slabs do not exceed 3/16 inch. The Contractor sha ll place expansion joints below grade, from1/16 inch to 3/16 inch. The Department will r eject expansion joints installed at elevations above the Roadway grade. The Contractor shall remove smaller discontinuities or high spo ts greater than 3/16 inch by rubbing with carborundum brick and water. The Contractor sh all correct larger areas of deck requiring repair by use of power grinders or similar tools approved by the Project Manager. The Department will not allow the use of a bush hamme r or similar tools to remove irregularities. When grinding, the Contractor shall not reduce the concrete cover over the reinforcing steel to less than 1 9/16 inch. If diamond grindin g cannot satisfactorily correct portions of decks, the Contractor shall remove and replace them at no additional cost to the Department. After rubbing and diamond grinding, the Contractor shall restor e the curing system on the deck as necessary. The Assistant District Engineer – Construction may direct the C ontractor to remove and replace unacceptable areas under the following conditions, at n o additional cost to the Department: 1. The finished deck surface is exceedingly rough; 2. Plastic shrinkage cracking or surface tearing is severe; 3. Serious damage due to any cause occurs over large areas of t he deck placement; or 4. Concrete cover over reinforc ing steel is less than required minimum.

512.3.10 3 Grooving of Hardened Concrete

The Contractor shall straightedge and repair the Bridge deck be fore grooving. The Contractor shall groove the deck after the deck has reached 75% of the design strength.

512.3.10 3.1 Grooving Machine

The Contractor shall groove hardened concrete with diamond blad es mounted on a multiblade arbor on a self-prope lled machine built for grooving concrete pavements. The Contractor shall provide a grooving machine with the following: 1. A depth control device that detects variations in the concre te surface and adjusts the cutting head height to maintai n the specified groove depth; and 2. A device to control alignment.

512.3.10 3.2 Groove Pattern

The Contractor shall groove the Bridge decks, approach slabs an d transition slabs parallel to the centerline of the Roadway if Bridge decks abut concrete pavement that is to receive longitudinal grooving, o r if specified in the Contract. Otherwise, the Contractor shall cut grooves perpendicular to the centerline of the Roadway. The Contractor shall begin grooving 18 inches from the gutter l ine or face of rail and run in a continuous pattern to 18 inches from the opposite gutter l ine or face of rail. The Contractor may increase the 18 inch dimension on one (1) side o f the deck to as much as 27 inches, if the clearance of the grooving machine does not al low a closer approach to the railing. The Contractor shall provide grooves that begin and end within from two

512.3.10 3.3 Grooving Residue Removal

The Contractor shall continuously remove resulting slurry or re sidue immediately following grooving operations. The Contractor shall clean the lands and the grooves and leave the surface free of slurr y residue and other Deleterious Material. The Contractor shall remove grooving residue by flushing, vacuu ming, or other methods approved by the Project Manager.

512.3.10 4 Penetrating Water Repellent

After finishing, repairing, and machine grooving, the Contracto r shall apply a penetrating water repellent treatment to Bridge decks and approach slabs in accordance with Section 532, “Penetrating Water Repellent Treatment.”

512.3.11 Superstructure Appurtenances

512.3.11 1 Construction Joints

The Contractor shall make construction joints smooth and true t o line, and finish them with an edging tool with a radius of approximately 1/8 inch. I f longitudinal construction joints are located off the crown, the Contractor shall provide a finis h across the joint that is smooth Section 512: Superstructu re Concrete Page 382 and of a slope to provide proper drainage of the deck.

512.3.11 2 Sealing of Construction Joints and Surface Cracks

After grooving and applying the penetrating water repellent, th e Contractor shall fill and seal construction joints and crac ks that are visible on a dry d eck with a resin in accordance with Section 535, “Crack Sealing Using Low-Viscosity, Gravity-F ed Sealers.” The Contractor shall apply resin to joints and cracks that perm it the flow of water through the deck thickness as recognized by leaching along the crack or joint lines when viewed from below the deck, as determined by the Project Manager.

512.3.11 3 Sidewalks, Curbs, and Raised Medians on Structures

The Contractor shall thoroughly tamp the concrete in Sidewalks, curbs, and raised Medians on Structures so that a layer of mortar approximately 1 /8 inch remains on top of the coarse aggregate. The Contractor shall strike off the surface of the concrete with a strike board to a uniformly smooth surface and float it with an accept able wood or cork float. The Contractor shall test the surface of Sidewalks and raised M edians with a ten (10) foot straightedge and ensure the surface does not vary more than 1/4 inch from the bottom of the straightedge. The Contractor shall give Sidewalks, curbs, and raised Medians a broomed surface finish. After finishing and curing, the Contractor shall give the Sidewalks, curbs, and raised Medians a penetrating water repellent treatment in accordance w ith Section 532, “Penetrating Water Repellent Treatment.”

512.3.11 4 Opening of Bridge Deck and Approach Slabs to Traffic

If it is necessary to open a Roadway to traffic at the earliest possible moment, the Assistant District Engineer for Construction may allow traffic on a Bridge deck or on approach slabs after the seven (7) Day curing period and after cylinders that are field cured in the same environment as the slabs demonstr ate the concrete reaches 90% o f specified design strength in accordance with Section 510.3.5.2, “In-Place Concrete Streng th Measurements.” The Department will allow traffic on the deck before the applic ation of the penetrating water repellent treatment, however; the Contractor shall perfor m the specified surface preparation procedures before application. The Contractor shall construct Bridge deck prior to approach an d transition slabs; no exceptions. Approach and trans ition slabs shall be constructed to match grade and elevation of the adjoining Bridge deck as sho wn in the Project Plans or a s directed by the State Bridge Engineer if adjustments are required to match the completed Bri dge deck.

512.4 Method of Measurement

The Department will measure Superstructure concrete using the d imensions shown in the Contract or approved modifications. The pay quantity will not be increased for any additional volume of concrete placed because of the use of metal stay-in-p lace forms.

512.5 Basis of Payment

PAY ITEM PAY UNIT Section 512: Superstructu re Concrete Page 383 Superstructure Concrete Cubic Yard High Performance Deck (HPD) Cubic Yard

512.5.1 Work Included In Payment

The following Work and items will be considered as included in the payment for the main item(s) and will not be measured or paid for separately: 1. All corrective Work; 2. Machine grooving; 3. Construction joint and crack sealing; 4. Formwork and lateral bracing system; and 5. Penetrating Water Repellent Treatment. Section 514: Concrete Barrier Railings For Bridges Page 384